Overview

math package of GO provides a RoundToEven method that can be used to round to even a number. It returns the nearest integer rounding ties to even.

Here you can read about use case of RoundToEven – https://mathematica.stackexchange.com/questions/2116/why-round-to-even-integers/2120

Below is the signature of the function. It takes input a float and also returns a float.

func RoundToEven(x float64) float64

Some special cases of RoundToEven function are

• RoundToEven(±0) = ±0
• RoundToEven(±Inf) = ±Inf
• RoundToEven(NaN) = NaN

Code:

package main

import (
    "fmt"
    "math"
)

func main() {
    res := math.RoundToEven(0.5)
    fmt.Println(res)

    res = math.RoundToEven(1.5)
    fmt.Println(res)

    res = math.RoundToEven(2.5)
    fmt.Println(res)

    res = math.RoundToEven(3.5)
    fmt.Println(res)

    res = math.RoundToEven(4.5)
    fmt.Println(res)
}

Output:

0
2
2
4
4